KVM: x86: fix user triggerable warning in kvm_apic_accept_events()

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commit 28bf288879 upstream.

If we already entered/are about to enter SMM, don't allow switching to
INIT/SIPI_RECEIVED, otherwise the next call to kvm_apic_accept_events()
will report a warning.

Same applies if we are already in MP state INIT_RECEIVED and SMM is
requested to be turned on. Refuse to set the VCPU events in this case.

Fixes: cd7764fe9f ("KVM: x86: latch INITs while in system management mode")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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David Hildenbrand 2017-03-23 11:46:03 +01:00 • committed by Greg Kroah-Hartman

parent f99985cdee

commit bdf1d5b4c1

1 changed files with 12 additions and 0 deletions

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arch/x86/kvm/x86.c

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